Coupling element and docking device comprising such a coupling element

The invention relates to a mating part (1) and a mating part and online (96). The first support for mating part (1) comprises a comprises a part elastic plate body (6), the plate body (6) and (18) in the plate body (6) and first end opposition the second support (20) and a sealing plate of the second end (2); Comprising a part elastic plate body (8); the plate body the first supporting the first end (22) and a plate body and first end opposition the second support (24) and a sealing plate of the second end (4), a first, second and a sealing plate plate body is at least part of the beam are closely connected; the first a sealing plate (2) first support (18) and second a sealing plate (4) second support (24) and a first a sealing plate (2) second support (20) and second a sealing plate (4) first support(22) And the situation capable of the first and second a sealing plate part are of said plate body is correspondingly arranged on.